Horn



Feb. 12, 1924.- 4 1,483,759

R. R. WILLIAMS ET AL.

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umrso STATES PATENT QFFlCE.

RALPH WILLIAMfJ, 0F DETROIT, AND JAMES T. IALLQY, 0F RICHMOND, MICKIGAH,

ASSIGNC RS Ti THE WIIILIAKS RADIO COMPANY, DETROIT, MICHI IGAN, A (301%PORATION OF M'XCIKIGAN.

HORN,

Application filed October 25, 1922. Serial-R0. 596,233.

To all whom it may concern;

Be it known that we,,RALm R. WILLIAMS and James T. Mamlofl'ci'tizens ofthe United States, residing at Detroit andRichmond, respective in thecounties of Wayne and Macomb nd State of Michigan, "have inventedcertain new and useful 1m 'rovemeats in Horns, of which the following is"as cification. a 'lhis invention relates to horns and more such deviceses ecially transmission in radio telephones while not limited to suchuse. T I

From each side of the reproducer diaphragms of telephone and radioreceivers particularly to and phonographs there are sent forthwavetrains of equal phase-and amplitude. It is the present practice toutilize but one of these wave trains, the other being wholly lost, andin the case of radio and telephone receivers, the second train generallyis held captive by the receiver casing and re flected back against thediaphragm setting up COllIltBD-Vlbi'fitlOIlS therein which strong-' lyaffect the purity and clarity of the uti lizcd train of sound waves.

It isan im'ortant objectof the present invention to e iminate the usualharshness, indistinctness and blatancy so common to the usual methods ofreproduction, by blending both sound wave trains emanating from adiaphragm in such a manner that perfect synchronism is obtainedaccompanied by purity of tone, accuracy of reproduction and a highdegree of amplification unhamp' I ered by the counter vibrations abovereferred to.

As1is well known sound waves vibrate substance, and in the usualconstruction of amplifying horns the sound waves set up independentvibrations in the material of the amplifiers which affect the purity oftone of the reproduced sound. We have found that in the practice of thepresent invention the method of utilizing both the trains of sound wavesemanating from a diaphragm lends itself particularly well to the-use ofa construction employing a sonorous metal of substantial weight, thesound reflecting surfaces of which are highly polished. A

In the drawings we have shown one embodiment of the invention. In thisshowing,

Figure 2.

Figure 1 is a' perspective view of a horn embodying the invention, I

Figure 2 is a central vertical longitudinal. sectional view,fand, 4

Figure 3 is a section on line 3-3 of out the invention we ro- In carryinfie supporting base 5, whic is vide a suitab preferably relativelynarrow at its upper portion, as shown at 6 in Figure 2. A substantiallyspherical sound reflecting chamber 7- is mounted at the upper end of thebase, the latter extending forwardly of-the spherical portion as shownin Fi res 1 and 2. The chamber 7 is provided orwardl with an annularshoulder 8 against whic be mounted areceiver 9. The receiver em ployedis referably of a type whereina ortion of t 0 rear wall may be remove toprovide an opening 10 which communicates directly with the diaphragm 11wherebythe sound waves emanating from the rear of 'surface of thechamber 7. The cover 12 may be secured in place by any suitable means(not shown) and is provided with a central opening 13 through which thelead wires to the receiver may pass.

An amplifyinghorn His mounted u on the base with its aids preferably inalinement with the center of the chamber 7 as shown in Figure 2. Thevertex end of the horn 14 communicates through an opening 15 with thechamber 7.

A"reverberatory sinus 16 afiords communication between the amplifyinghorn and the chamber 7. As shown the sinus 16 has a forward 0 ening 17which communicafes with the interior of the horn at a point adjacent theopening 15 while the may rearward portion of the sinus communicatescurved transversely as shown in Figure 3 the wall 19 forming a smoothcontinuation of the spherical inner surface of the chamber 7 and cover12. In the preferred constr resistance to the passage or .ie sound r Theoperation. of the do I u M llanfsmlcckifl SOUHQS, 1G

diaphragm 11 emanate s "s into the c l-shaped horn ii are amplified inthe usual manner excep that to preserve the purity of tone. The wavetrain emanating from the rearward side of the diaphragm is reflected bythe polished surfaces of the chamber and without distortion, into so 15,the wells of which in turn Lfifli l the sound through the opening 1'?Where 21] joined with forward vibrations one train 1c r tions of theother in such a manner sis produce an amplified reproduction oftoetransmitted sound whereiirthe true t qualities thereof are preserved, 1dr amplification-iron; the standpoint of more loudness as is true ofdevices no"; in use. So amplified, the reproduced sound hes been foundto remarkable puritr carrying power not heretofore 1 due to the absenceof destructive counterribrations. It is to be understood t our inventionherewith shown 15 to be taken as a preferred example of the same, andthat i'sl jous changes in the shape, size, and arrangement of parts maybe resorted towithout departing from the spirit of the invention or thescope of the subjoined claims.

Havin described our invention, we claim 1. A crevice of the characterdescribed comprising a reflecting chamber adapted to receive soundproducing diaphragm, en amplifying horn having an inletopening in itsvertex end communicating with said clunnber. and {L rcverberetorv sinuscommu- I nicating between said chamber one said born. 1

. n A de ice or the Cl'LEiJ ucscrlncd :lng a reflecting chamber adaptedto s sound producing diaplnragm, an i ng horn vertex end communicatingwith said 1131:, and a reverberatory sinus commu- 1 zting between saidchamber and said horn. adjacent the inlet opening therein.

A device of the character described comprising a reflectin chamberadapted to receive a sound producing diaphragm or f rward portion, anamplifying horn having an inlet openingio its vertex end immunicotingwith the forward portion said chamber, and a revcrberator sinus and saidhorn adjacent the inlet end thereof 1; device of the character describedcomprising a substantially spherical reflecting chamber adapted toreceive a. sound producing diaphragm in it forward For tion, on.amplifying horn having its axis in zlinement with the center of saidchamber and having an inlet opening in its vertex end communicatingWith' the forward por Zion of said chamber, and a rcverberotory sinuscoinmunicating'betweeu the said chamber and said horn adjacent the inletend thereof. I

A device of the character described comprising a substantially,sphericsi fleeting chamber at opted to receive a sound "oducingzdiaphragm: in its forward por tion, on alll lllfyll'lg horn having itsaxis substantially in slime-moot with the center said chamber and havingan inlet ope-uin its vertex. end conunuuicating with "he forward portionof said chamber, and a reverberatory sinus communicating between thesaid chamber and said horn adjocent the inlet end thereof, the foruuirdand rem. lower walls of said sinus being, sub-- s".intii1ll v straightand inclined upwardly toward their ends.

(3. A device of the character described comprising a relatively largeRALPH ll. VILLL M JAIXEES T. MALLQY,

having an inlet; opening communicating between the said 0 amber.

